$data = json_decode($json,true);
$items = $data['items'];
$i = 0;
foreach ($items as $item) {
    $i++;
    $str = 'Font '.$i.' '.$item['family'].' Subsets:';
    foreach ($item['variants'] as $variant) {
      $str .= ' '.$variant.' ';
    }
    $str.= ' Variants';
    foreach ($item['subsets'] as $subset) {
      $str .= ' '.$subset;
    }
    echo $str.'<br />';
}

这正是您想要的.